Sayles, G. O. 1901- The medieval foundations of England. - [1st American ed., rev., with new pref. and introd.] - Philadelphia, University of Pennsylvania Press, 1950. - xxv, 482 p. 23 cm. Includes bibliographies. LCCN: 50008464 Subjects--Geographic Terms: Great Britain--History--To 1485. LC Class. No.: DA130 / .S39 1950 Dewey Class. No.: 942.01